Suffolk County Community College

 

PSY-210  Lifespan Psychology                                            Prof. R. Morse                                      

 

Berger 8th Ed. Ch 3 Practice Questions

 

The Multiple Choice questions that follow are taken from a Test Bank developed by Kathleen Stassen Berger, the author of our textbook.  The answers to these questions can be obtained by sending me an e-mail with your proposed answer key.  Some of these questions will appear on your Final exam.

 

1.

Approximately how many genes are contained in the human genome?

 

A)

25

 

B)

250

 

C)

20,000

 

D)

2.5 million

 

2.

Saul and Joe are unrelated nextdoor neighbors. What percentage of the human genome do they share?

 

A)

50 percent

 

B)

80 percent

 

C)

99.9 percent

 

D)

100 percent

 

3.

A sperm cell has ______ as many chromosomes as a normal body cell.

 

A)

half

 

B)

four times

 

C)

twice

 

D)

just

 

4.

The chromosomal make-up of a normal male is ______; the chromosomal make-up of a normal female is ______.

 

A)

YY; XY

 

B)

XX; XY

 

C)

XY; XX

 

D)

YY; XX

 

5.

Differentiation refers to the process by which:

 

A)

zygotic cells specialize depending on where they are located.

 

B)

the single zygotic cell splits into two cells, then four cells, and so on.

 

C)

identical twins attempt to make a distinction between themselves.

 

D)

sperm and ova are formed.

 

6.

What is unique about stem cells?

 

A)

They have the ability to differentiate into any type of cell.

 

B)

They are only found in humans.

 

C)

They are only found in adult humans.

 

D)

They make up less than 1 percent of autosomes.

 

7.

Monozygotic twins are produced when:

 

A)

two ova are fertilized by a single sperm.

 

B)

one ovum is fertilized by one sperm, and then splits to form two clusters.

 

C)

two ova are fertilized by two different sperm.

 

D)

one ovum is fertilized by two sperm, and then splits to form two clusters.

 

8.

Marsha has twins, a boy and a girl. The twins are:

 

A)

identical.

 

B)

dizygotic.

 

C)

the result of one zygote splitting in two.

 

D)

monozygotic.

 

9.

Approximately 99 percent of human genes are also present in other creatures. Given the percentage of genes we share with cats, for example, why are we so different from them?

 

A)

The presence of “junk” DNA and regulator genes found in humans influence other genes.

 

B)

Only humans possess chromosomes which influence other chromosomes.

 

C)

Humanoid chromosomes are absent in other species.

 

D)

Other animals have fewer regulator genes than humans.

 

10.

A gene is recessive when:

 

A)

its influence skips a generation.

 

B)

its influence can be hidden by a more powerful gene.

 

C)

it is smaller than the other genes.

 

D)

it does not appear in the genotype.

 

11.

Recessive X-linked genes are:

 

A)

more likely to be expressed in a man's phenotype.

 

B)

more likely to be expressed in a woman's phenotype.

 

C)

carried on all chromosomes.

 

D)

never expressed in a phenotype.

 

12.

Chromosomal abnormalities are most often associated with:

 

A)

paternal age.

 

B)

maternal age.

 

C)

environmental agents.

 

D)

use of illegal drugs.

 

13.

People with Down syndrome:

 

A)

have a third chromosome in the 19th pair.

 

B)

have a third chromosome in the 21st pair.

 

C)

are missing a chromosome.

 

D)

are missing two chromosomes.

 

14.

Mental retardation caused by a fragile-X chromosome appears:

 

A)

in males only.

 

B)

in females only.

 

C)

in both sexes equally.

 

D)

more frequently in males than in females.

 

15.

Phenylketonuria is caused by a(n):

 

A)

dominant gene.

 

B)

double-recessive gene.

 

C)

X-linked gene.

 

D)

single recessive gene.